Reply To: Week 7 – Discussion Board 2

Welcome To Interpreters Associates, Inc. Forums Week 7 – Discussion Board 2 Reply To: Week 7 – Discussion Board 2


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Soila Morales # Posted on October 27, 2022 at 11:34 am

Alveoli are tiny air sacs located in the alveolar sacs of the lungs in the pulmonary lobules of the respiratory zone that take up the oxygen you breathe in and keep your body going. It is estimated that there are 300 to 500 million alveoli in the adult lungs. To aid in gas diffusion within the alveoli, these air sacs are lined with a layer of water. A surfactant is produced within the alveoli to reduce the surface tension present. This keeps the alveoli from collapsing when exhaling.The walls of the alveoli share a membrane with the capillaries. That’s how close they are. This lets oxygen and carbon dioxide diffuse, or move freely, between the respiratory system and the bloodstream. Oxygen molecules attach to red blood cells, which travel back to the heart. The alveoli are made up of two different types of cells. Each type has different functions:

Type I pneumocytes. These are the cells responsible for the exchange of oxygen and CO2.

Type II pneumocytes. These cells perform two important functions. They produce surfactant, the fluid inside the alveoli that helps keep the balloon shape from collapsing. They can also turn into type I cells in order to repair damage.

The Alveoli also contains immune cells called alveolar macrophages these are like the garbage trucks of the immune system. These cells devour , or eat debris. Macrophages clean up any particles that are breathed in and make it to the alveoli. They also remove dead cells and bacteria. The alveoli will only work correctly if their tissue is healthy. Certain medical conditions can negatively impact alveoli by causing inflammation, scarring, infection, and fluid build-up some of those lung diseases are Pneumonia, Emphysema, Tuberculosis, Alveolar proteinosis, Bronchioloalveolar carcinoma, Acute respiratory distress syndrome, Respiratory distress syndrome, and Pulmonary edema. The alveoli are an important part of the respiratory system. They are responsible for moving oxygen into, and CO2 out of, the bloodstream.